In early 1990s Boston, ADA, Decourcy Ward, forms an unlikely alliance with a corrupt venerated FBI veteran, Jackie Rohr. Together, they take on a case that changes the city's entire criminal justice system.
Cast:Kevin Bacon , Aldis Hodge , Lauren E. Banks , Jill Hennessy , Matthew Del Negro , Amanda Clayton , John Doman , Mark O'Brien , Blake Baumgartner , Mark Ryder , Nora Murphy , Grayson Eddey , Catherine Wolf , Lucia Ryan , Kevin Interdonato , Jonathan Tucker , Jere Shea , Kevin Chapman
Jackie gets a job offer but has no idea what he's getting himself into. Decourcy receives bad news which lands him back in Brooklyn. Siobhan takes on a case against a construction colossus. Jenny volunteers at a community center.
When Victoria runs away from home, Jackie tries to find her. Caysen seeks justice for a Strike Force member. Decourcy is in Brooklyn looking after his father while Siobhan experiences an array of symptoms. Diarmuid tries to help Jenny.
Decourcy takes on a case involving a murdered police officer and recruits the help of Caysen. As the Drydens try to solve their Victoria problem, the Rohrs drop Benedetta off for her freshman year at NYU.
As Jackie continues his fling with Letitia Dryden, Jenny sets out to get her husband reinstated in the FBI. The pressure on Decourcy mounts when a colleague competing for the position of DA lands a conviction. Caysen testifies at the federal trial of Tony Suferin and is blindsided by the consequences. A threatening interaction offers Siobhan a sense of what exactly she is up against in her fight for the Mendoza family.
With the evidence against Sinclair Dryden piling up, Jackie takes action. As Decourcy fights to prove Curtis Whitaker's innocence, Caysen entertains a compromise. Siobhan makes headway in her case but then suffers a setback.
Jackie shows a glimpse of vulnerability when a violent attack stalls the Dryden investigation, but Decourcy presses on, tracking down a list of Sinclair's potential victims.
As Jenny grows closer to Diarmuid, Jackie is released from the hospital and is after revenge. Siobhan calls on Decourcy for help she fights to expose Needham Industries' malfeasance. The DA's office bumps up against an unforeseen obstacle.
As Decourcy prepares to take Sinclair Dryden to trial, despite pushback from the Suffolk County DA, Jackie tracks down a key witness. Siobhan reaches a settlement on behalf of the Mendoza family, but her moment in the spotlight is cut short. Caysen is offered a second chance by a loved one. Reckoning with the rifts in her own family, Jenny meets her long-lost half-brother. Season finale.